10 laboratoriya Prtokol asosida ma’lumot almashish klient-server dasturini yaratish Klient-server dasturini ishlab chiqishda NetBeans ide muxiti va java dasturiy ta’minotini o‘rnatish

FTP protokoli asosida tarmoqda fayllarni almashish klient dasturini ishlab chiqish
package ftpclient;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.net.Socket;
/**
*
*/
public class FTPClient {
public static void main(String args[]) throws Exception
{ Socket soc=new Socket("127.0.0.1",5217);
transferfileClient t=new transferfileClient(soc);
t.displayMenu();
}}
class transferfileClient
{ Socket ClientSoc;
DataInputStream din;
DataOutputStream dout;
BufferedReader br;
transferfileClient(Socket soc)
{ try
ClientSoc=soc;
din=new DataInputStream(ClientSoc.getInputStream());
dout=new DataOutputStream(ClientSoc.getOutputStream());
br=new BufferedReader(new InputStreamReader(System.in));
} catch(Exception ex)
{
}
} void SendFile() throws Exception
{ String filename;
System.out.print("Enter File Name :");
filename=br.readLine();
File f=new File(filename);
if(!f.exists())
{ System.out.println("File not Exists...");
dout.writeUTF("File not found");
return; }
dout.writeUTF(filename);
String msgFromServer=din.readUTF();
if(msgFromServer.compareTo("File Already Exists")==0)
{ String Option;
System.out.println("File Already Exists. Want to OverWrite (Y/N) ?");
Option=br.readLine();
if(Option=="Y")
{ dout.writeUTF("Y");
} else
{ dout.writeUTF("N");
return;
} }
System.out.println("Sending File ...");
FileInputStream fin=new FileInputStream(f);
int ch;
do
{ ch=fin.read();
dout.writeUTF(String.valueOf(ch));
} while(ch!=-1);
fin.close();
System.out.println(din.readUTF());
} void ReceiveFile() throws Exception
{ String fileName;
System.out.print("Enter File Name :");
fileName=br.readLine();
dout.writeUTF(fileName);
String msgFromServer=din.readUTF();
if(msgFromServer.compareTo("File Not Found")==0)
{
System.out.println("File not found on Server ...");
return;
}
else if(msgFromServer.compareTo("READY")==0)
{
System.out.println("Receiving File ...");
File f=new File(fileName);
if(f.exists())
{
String Option;
System.out.println("File Already Exists. Want to OverWrite (Y/N) ?");
Option=br.readLine();
if(Option=="N")
{ dout.flush();
return;
}
}
FileOutputStream fout=new FileOutputStream(f);
int ch;
String temp;
do
{ temp=din.readUTF();
ch=Integer.parseInt(temp);
if(ch!=-1)
{
fout.write(ch);
}
}
while(ch!=-1);
fout.close();
System.out.println(din.readUTF());
}
}
public void displayMenu() throws Exception
{ while(true)
{ System.out.println("[ MENU ]");
System.out.println("1. Send File");
System.out.println("2. Receive File");
System.out.println("3. Exit");
System.out.print("\nEnter Choice :");
int choice;
choice=Integer.parseInt(br.readLine());
if(choice==1)
{ dout.writeUTF("SEND");
SendFile();
} else if(choice==2)
{ dout.writeUTF("GET");
ReceiveFile();
} else
{ dout.writeUTF("DISCONNECT");
System.exit(1);
} } }}